William onions and henry roberts



$1 I a 'i mien taire anni ffrt.-

. s? ip ti? Y Laim Patent No. 76,239, dated Marat a1, 186e.

IitrRovRMRNr IN'LAMrcHrMNRrS.-

alge'tlgrhule mara itin ligar tettert atint animating pitt 'ti tigt time To ALL WROM 1r MAY coNonRN:

Be it known that we, WILLIAM ONION'sand HNRY ROBERTS, of St. Louis, in the county of St.V Louis, and State of Missouri, havefinvented a newl and improved Lamp-'Chimneyg and we do hereby decla-re that the following-,is a full, clear, and exact description thereof?, which will enable those skilled-in thefart to make and, use the same, referencebeing had to the accompanying 'd1'a\yings,rfo'rming partofthis specification.

This invention relates to a new and improved lamp-chimney, of that class which `is composed of glass and4 metal, a glassloiver portion and a metal upper portion.' l l The invention consists in a newfand improved means for securing the metal to the glass portion of' the chimney, Ywhereby the latter isprevented from breaking under the expansion of. thc former-a contingmncy-v of frequent occurrence with chimneys of this class. 'In the accompanyng'sheet'of drawingsv Figure v1 is a vertical central section of `our invention.

Figure 2, an enlarged horizontal section of the same, taken in the line :c z, iig. 1.

Similar'letters of referenceindicate corresponding parts. i

A representsthe'lower glass portion of the' lamp-chimney, and B the upper metal portion, the latterbeing of conical form,'and havingits lower and larger end equal indiameter tothenpper and smaller end of the glassportion A. Withinthc lower part of the metal portion B ofthe chimney, there is attached, by a rivet, a, metal elastic b'andC, the ends of which are free, or not attached, andeach provided with a pin, b, Which entend-s through oblong slots c, in the lowerpart of B.'

-This band C, by its own elasticity, has `a tendency to reina-inl in an expanded state, and said band is of a conical form, and extends down below the lower end ci B, so that it mayt within the upper end of the glass portion A, the band being inserted .incthe chimney by pres-sing the pins b b towards each other,vand thereby compressing or diminishing the diameter of the band, so that it may be'tted in the upper end of A, and when the pins b b are released, the band allowed to expand by its own elasticity, and its eonica'lfside allowed to fit snuglyI against the inner side of the glass portion A, as shown in iig, L The band forms a secure fastening for securing B to A, the lower end` of B being provided with a ange, ax, to rest on'the top of A.' i

' In order to detach the metal portion, B, from A, all that is required is simply to press the pins b b towards each other, so as to contract or Vdiminish the diameter ofy the band C, and B vmay be removed from A without anz,y dilicultylwhatever. l I i I' v This band C, it willbe-seen, mayexpand andcontractv freely, and hence there is no danger 4of the, glass portion A cracking under the expansion of-itself, or the metal portion B fromthe heat of the burner, a comingency of frequent occurrence with the ordinarycombinefl metal and glass lamp-chimneys, owing to the expansion 'of the same frointh'e beat of the burner, the metallic portion being;r attached to the glass portion by a rigid connection, and the cl'er'ence'in the degree of expansion between the glass and metal favoring the result.

l We claim as new, and desre'to secure by Letters Patent- I The elastic band C, attached tothe lower part o'f the upper metallic .portion B of the'la-mp-chimney, and extending dow'n below the same, 'to fit into the upper end of theglass portion A ofthe chimney, substantially in the manner as and for't'he purpose' set forth.

' WILLIAM ,ONIONS, HENRY ROBERTS.

Witnesses: FnRD. STROOP, CEAS. C. OBERT. 

